The old saying "All good things must come to an end" is particularly appropriate for Prince Harry and Prince William right now, as the pair and their wives say goodbye to a very important pillar in their lives.
On Tuesday evening, the Cambridges and Sussexes released a statement outlining exactly just how much this change really meant to them.
And going by their words, it seems things will be looking quite different for them from here on in.
So what exactly has gone on, you ask? Well, many are aware of Harry and William's involvement in their own charity The Royal Foundation.
Change is already afoot within the organisation, with it recently being announced that Prince Harry and wife Duchess Meghan would be parting ways with the charity formally in order to start their own separate charitable projects.
Now, another big change has occurred within the original royal organisation - the CEO Lorraine Heggessey, of whom Harry and William were undoubtedly close with, has stepped down after two and a half years in the role.
The emotional news was clearly felt by William and wife Duchess Catherine, who have said in a statement: "Lorraine has played an integral role in our charitable initiatives over the last two and a half years."
The couple added: "We are very grateful for her hard work and support, and wish her the very best for the future."
As for Prince Harry and Duchess Meghan, the pair are clearly feeling just as sentimental.
"It has been a great pleasure to work alongside Lorraine over the past couple of years, to champion the causes that we feel so strongly about, and we wish her well for the next stage of her career."
It is understood Lorraine will stepped down as CEO sometime in the British Autumn.
WATCH: Prince Harry and Meghan Markle speak with delegates at the Commonwealth Youth Forum. Story continues after video...
Taking over Lorraine at the helm of the charity will be Jason Knauf. His role will entail working a lot more closely with Duchess Catherine and William as it becomes their principal charitable vehicle.
On her departure, Lorraine had some lovely parting words to share.
"This was one of the most amazing opportunities of my career. It has been a huge honour to work with Their Royal Highnesses to try to change mind-sets on a wide range of issues."
She referenced the work for Heads Together, a mental health campaign championed by Kate, William and Harry for a number of years, as well as their work in caring for veterans.
"I am very proud of what The Royal Foundation has achieved during this exciting period of growth. However, as it enters its next phase, I believe it is the right time for me to step down and to pursue my interests in the media sector."
At present, Harry and Meghan have already kick-started their plans for a new charity that will work alongside the Royal Foundation.
Just last week, it was announced the charity would be called Sussex Royal. It is also understood that Harry and Meghan will bring a number of their own current initiatives over to the new foundation, including the Invictus Games, which was created by Harry.